#pragma semicolon 1
#pragma newdecls required

#include <basic>
#include <sourcemod>
#include <sdkhooks>
#include <sdktools>


public Plugin myinfo =
{
	name 			= "ZItemKnockback",
	author 			= "BotoX",
	description 	= "",
	version 		= "0.0",
	url 			= ""
};

public void OnPluginStart()
{
}

public void OnClientPutInServer(int client)
{
	SDKHook(client, SDKHook_WeaponEquipPost, OnWeaponEquip);
}

public Action OnWeaponEquip(int client, int entity)
{
	if(!IsValidEntity(entity))
		return;

	char sClassname[64];
	GetEntityClassname(entity, sClassname, sizeof(sClassname));
	if(strcmp(sClassname, "weapon_knife", false) != 0)
		return;

	int HammerID = GetEntProp(entity, Prop_Data, "m_iHammerID");
	if(!HammerID)
		return;

	char sTargetname[64];
	GetEntPropString(entity, Prop_Data, "m_iName", sTargetname, sizeof(sTargetname));

	CheckWeaponChildren(client, entity);
}

void CheckWeaponChildren(int client, int parent)
{
	int entity = INVALID_ENT_REFERENCE;
	while((entity = FindEntityByClassname(entity, "*")) != INVALID_ENT_REFERENCE)
	{
		if(GetEntPropEnt(entity, Prop_Data, "m_pParent") != parent)
			continue;

		char sClassname[64];
		GetEntityClassname(entity, sClassname, sizeof(sClassname));

		if(!strncmp(sClassname, "func_physbox", 12, false) || !strcmp(sClassname, "func_breakable", false))
		{
			SDKHook(entity, SDKHook_OnTakeDamagePost, OnTakeDamagePost);
		}

		else if(!strcmp(sClassname, "trigger_push", false))
		{
			AcceptEntityInput(entity, "Kill");
		}
	}
}

public void OnTakeDamagePost(int victim, int attacker, int inflictor, float damage, int damagetype, int weapon, const float damageForce[3], const float damagePosition[3])
{
	if(attacker <= 0 || attacker > MAXPLAYERS)
		return;

	int iKnife = GetEntPropEnt(victim, Prop_Data, "m_pParent");
	if(iKnife <= 0)
		return;

	int client = GetEntPropEnt(iKnife, Prop_Data, "m_hOwnerEntity");
	if(client <= 0 || client > MAXPLAYERS)
		return;

	SDKHooks_TakeDamage(client, inflictor, attacker, damage, damagetype, weapon, damageForce, damagePosition);
}